The suit states that the agencies’ actions violate the First Amendment and the Religious Freedom Restoration Act of 1993 [Cornell LII backgrounders]. CAIR-MI filed the suit after filing several unaddressed complaints with the civil rights office of the Department of Homeland Security over the past year. In addition to improper detention and religious questioning, the lawsuit alleges inappropriate criminal treatment of the plaintiffs, including strip searches, invasive body searches, fingerprinting, and separating family members traveling together.